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A lot of research has been proposed to improve network performance in the data center. However, with the development of distributed applications, these applications face a new performance bottleneck since existing solutions almost ignore the application level optimization. The concept of coflow has been proposed which provides a chance for us to optimize network in application level rather than individual...
We propose a generic transformation on maximum distance separable (MDS) codes, which can convert any non-binary (k+r, k) MDS code into another (k+r, k) MDS code with the following properties: 1) An arbitrarily chosen r nodes will have the optimal repair bandwidth and the optimal rebuilding access, 2) the repair bandwidth and rebuilding access efficiencies of all other nodes are maintained as in the...
In this paper, a novel method for ground moving target indication (GMTI) and parameter estimation is proposed with single channel of synthetic aperture radar (SAR) system. The proposed method uses the varying Doppler chirp rate to get a new image, where the clutter scatters are motionless and the moving targets are translational along slant range direction compared with the original image. As a result,...
The benefits of network layer cooperation cognitiveradio networks have been gradually recognized in recent years. In this paper we consider the network layer cooperation incognitive radio network, whereby primary users select somesecondary users to relay packets, in return for more favourablespectrum access rules for secondary users. Under this cooperationscheme, we investigate how to enlarge the...
We propose a novel Quality of Service (QoS) vertical handoff scheme with the support of the Software-Defined Network (SDN) technique for the heterogeneous wireless networks. The proposed scheme solves two important issues of the vertical handoff: network selection and handoff timing. In this paper, the network selection is formulated as an 0–1 integer programming problem, which maximizes the overall...
With the proliferation of advanced and interactive services together with the high demand for premium quality of experience, upstream traffic in passive optical networks is growing fast in recent times. Motivated by this, a new power saving mechanism called the sleep-transmit mode (STM) is proposed, which enables the optical network units (ONUs) at customer premises to transmit upstream data during...
In this paper, several signal-to-noise rate increasing methods are proposed for microbolometric infrared image sensor. By reviewing the basic working principle of microbolometer, we have obtained the signal respond expression of a typical structure microbolometer and given out the noise characteristics of the microbolometer. Additionally, the universal infrared responding signal process is analyzed...
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